Illustrator always opens Document in new Window

[joe-dnmn]

When I create a new document or when I open an existing document Illustrator always opens a new window which is not attached to the program. I have to drag it first to the tabs so that it is inside of the program. I can't find the setting that changes this behavior.

[Bill Silbert · Accepted solution]

Do you have "Open Documents As Tab" selected in the User Interface section of your Illustrator preferences? Check this and then quit the program and it should become the default. You may have to do it with no document open for it to become the default.

[joe-dnmn]

Yes, that's exactly what I was looking for. Thanks a lot, I searched a lot for this option but somehow missed it.

[Bill Silbert]

Happy to help.

[tjeuh39775924]

I have this selected, but i still have the same problem.

[Ton Frederiks]

Do you have Window > Application Frame checked?

[mollym10212822]

Not quite sure what you mean. But I am too experiencing this same problem ever since updating AI, extremly frustrating. I have unchecked the the box and files are contining to open as individual tabs. 

[Doug A Roberts]

I don't know if you have terminology mixed up here, but if you have the same problem as the OP, you need to check that box to solve it.

[TRS24792302gsui]

Did you get to resolve this? I too have the same issue here. Although I unchecked everything, still the same.

[Ton Frederiks]

And when both are checked?

[Hyanri]

I have the same problem and this is checked. It launches a new Illustrator app, when it used to just open in an existing AI window.

[Doug A Roberts]

Are you opening files via File > Open or from your OS? Do you have more than one version of Illustrator installed?

[Hyanri]

yeah i came here to update. i noticed days ago that there's 2 versions of illustrator which idk why that is. i thought the new one will lalways overwrite the old one during updated - and that caused my computer to have 2 illustrators with different histories and different recent and recognized files.

[Doug A Roberts]

There's a checkbox for removing old versions when you update. If you uncheck it, it will leave the old version installed.